烷基化碳量子点表面活性剂的制备及性能
Preparation and properties of alkylated carbon quantum dot surfactants
朱林 1刘庆旺 1孙勇强 2范振忠 1王旭 1仝其雷1
作者信息
- 1. 东北石油大学石油工程学院
- 2. 东北石油大学石油工程学院;中国石油大庆油田第四采油厂
- 折叠
摘要
目的 通过对水热法制备的氮掺杂碳量子点进行烷基化改性,对碳量子点在油气开发领域中的应用潜力进行研究.方法 在水热条件下,以柠檬酸作为碳源、二乙烯三胺为氮源合成了碳量子点(CQDs)和氮掺杂碳量子点(N-CQDs);通过烷基化反应对制备出的N-CQDs进行表面改性,得到一种两亲性表面活性物质R-(N-CQDs).结果 CQDs和N-CQDs的粒径分布均匀,具有碳量子点的典型粒径特征;CQDS和N-CQDs的荧光量子产率在各自最大激发波长下分别为10％和47％,氮掺杂极大地提高了碳量子点的荧光性能;与常用表面活性剂SDBS相比,R-(N-CQDs)具有更好的降低表面张力能力、稳泡性能和乳化性能.结论 烷基化改性后的碳量子点具有良好的降低表面张力的能力,优异的乳化性能和稳泡性能,在油气开发领域中有一定的应用潜力.
Abstract
Objective To study the application of nitrogen-doped carbon quantum dots(CQDs)in oil and gas development through alkylation modification of CQDs prepared by hydrothermal method.Methods Carbon quantum dots CQDs and nitrogen-doped carbon quantum dots N-CQDs were synthesized with citric acid as carbon source and diethylenetriamine as nitrogen source under hydrothermal conditions.An amphiphilic surfactant R-(N-CQDs)was obtained by surface modification of the prepared N-CQDs through an alkylation reaction.Results The particle size distribution of CQDs and N-CQDs was uniform,with the typical particle size characteristics of carbon quantum dots.The fluorescence quantum yields of CQDs and N-CQDs were 10％and 47％,respectively,at the maximum excitation wavelength,and nitrogen doping significantly improved the fluorescence properties of carbon quantum dots.Compared with commonly utilized surfactant SDBS,R-(N-CQDs)could reduce surface tension and improve foam stability and emulsification.Conclusion The modified carbon quantum dots can reduce water surface tension,have excellent emulsification and foam stabilization performance,and have specific application potential in oil and gas development.
关键词
碳量子点/氮掺杂/表面改性/烷基化/荧光量子产率Key words
carbon quantum dots/nitrogen doping/surface modification/alkylate/fluorescence quantum yield引用本文复制引用
基金项目
黑龙江省自然科学基金(LH2020E014)
出版年
2024
国家科技期刊平台
NSTL
万方数据